package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1" + c1);
        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2" + c2);
        c1.addAll(c2);
        System.out.println("c1" + c1);
        System.out.println("c2" + c2);
        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        //containsAll() 判断当前集合是否包含指定集合元素
        boolean contains = c1.containsAll(c3);
        System.out.println(contains);
        /*
        取交集：retainAll c1中仅保留与c3共有的元素，c3不变
         */
//        c1.retainAll(c3);
//        System.out.println("c1"+c1);
//        System.out.println("c3"+c3);
        //删交集：removeAll，删除共有的元素，c3不变
        c1.removeAll(c3);
        System.out.println("c1" + c1);
        System.out.println("c3" + c3);

    }
}
